From 5e9c2a8dac19d5df0c541ea23df654062de917c0 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Gr=C3=A9gory=20ESTRADE?= Date: Wed, 16 Mar 2016 17:06:01 +0000 Subject: [PATCH] bcm2835_fb: add framebuffer device for Raspberry Pi MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The framebuffer occupies the upper portion of memory (64MiB by default), but it can only be controlled/configured via a system mailbox or property channel (to be added by a subsequent patch). Signed-off-by: Grégory ESTRADE Reviewed-by: Peter Maydell Signed-off-by: Andrew Baumann Message-id: 1457467526-8840-4-git-send-email-Andrew.Baumann@microsoft.com [AB: added Windows (BGR) support and cleanup/refactoring for upstream submission] Signed-off-by: Andrew Baumann Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- hw/arm/bcm2835_peripherals.c | 38 +++- hw/arm/bcm2836.c | 2 + hw/arm/raspi.c | 5 +- hw/display/Makefile.objs | 1 + hw/display/bcm2835_fb.c | 424 +++++++++++++++++++++++++++++++++++ include/hw/arm/bcm2835_peripherals.h | 2 + include/hw/display/bcm2835_fb.h | 47 ++++ 7 files changed, 517 insertions(+), 2 deletions(-) create mode 100644 hw/display/bcm2835_fb.c create mode 100644 include/hw/display/bcm2835_fb.h diff --git a/hw/arm/bcm2835_peripherals.c b/hw/arm/bcm2835_peripherals.c index d6453cc..c2fe6b7 100644 --- a/hw/arm/bcm2835_peripherals.c +++ b/hw/arm/bcm2835_peripherals.c @@ -62,6 +62,16 @@ static void bcm2835_peripherals_init(Object *obj) object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr", OBJECT(&s->mbox_mr), &error_abort); + /* Framebuffer */ + object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB); + object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL); + object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size", + &error_abort); + qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default()); + + object_property_add_const_link(OBJECT(&s->fb), "dma-mr", + OBJECT(&s->gpu_bus_mr), &error_abort); + /* Property channel */ object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY); object_property_add_child(obj, "property", OBJECT(&s->property), NULL); @@ -84,7 +94,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) Object *obj; MemoryRegion *ram; Error *err = NULL; - uint32_t ram_size; + uint32_t ram_size, vcram_size; CharDriverState *chr; int n; @@ -174,6 +184,32 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ, INTERRUPT_ARM_MAILBOX)); + /* Framebuffer */ + vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size", + &err); + if (err) { + error_propagate(errp, err); + return; + } + + object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size, + "vcram-base", &err); + if (err) { + error_propagate(errp, err); + return; + } + + object_property_set_bool(OBJECT(&s->fb), true, "realized", &err); + if (err) { + error_propagate(errp, err); + return; + } + + memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT, + sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0)); + sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0, + qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB)); + /* Property channel */ object_property_set_int(OBJECT(&s->property), ram_size, "ram-size", &err); if (err) { diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c index 0321439..89a6b35 100644 --- a/hw/arm/bcm2836.c +++ b/hw/arm/bcm2836.c @@ -42,6 +42,8 @@ static void bcm2836_init(Object *obj) &error_abort); object_property_add_alias(obj, "board-rev", OBJECT(&s->peripherals), "board-rev", &error_abort); + object_property_add_alias(obj, "vcram-size", OBJECT(&s->peripherals), + "vcram-size", &error_abort); qdev_set_parent_bus(DEVICE(&s->peripherals), sysbus_get_default()); } diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c index 6582279..5498209 100644 --- a/hw/arm/raspi.c +++ b/hw/arm/raspi.c @@ -113,6 +113,7 @@ static void setup_boot(MachineState *machine, int version, size_t ram_size) static void raspi2_init(MachineState *machine) { RasPiState *s = g_new0(RasPiState, 1); + uint32_t vcram_size; DriveInfo *di; BlockBackend *blk; BusState *bus; @@ -149,7 +150,9 @@ static void raspi2_init(MachineState *machine) qdev_prop_set_drive(carddev, "drive", blk, &error_fatal); object_property_set_bool(OBJECT(carddev), true, "realized", &error_fatal); - setup_boot(machine, 2, machine->ram_size); + vcram_size = object_property_get_int(OBJECT(&s->soc), "vcram-size", + &error_abort); + setup_boot(machine, 2, machine->ram_size - vcram_size); } static void raspi2_machine_init(MachineClass *mc) diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs index f0cf431..d99780e 100644 --- a/hw/display/Makefile.objs +++ b/hw/display/Makefile.objs @@ -27,6 +27,7 @@ endif obj-$(CONFIG_OMAP) += omap_dss.o obj-$(CONFIG_OMAP) += omap_lcdc.o obj-$(CONFIG_PXA2XX) += pxa2xx_lcd.o +obj-$(CONFIG_RASPI) += bcm2835_fb.o obj-$(CONFIG_SM501) += sm501.o obj-$(CONFIG_TCX) += tcx.o obj-$(CONFIG_CG3) += cg3.o diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c new file mode 100644 index 0000000..779b56f --- /dev/null +++ b/hw/display/bcm2835_fb.c @@ -0,0 +1,424 @@ +/* + * Raspberry Pi emulation (c) 2012 Gregory Estrade + * Refactoring for Pi2 Copyright (c) 2015, Microsoft. Written by Andrew Baumann. + * This code is licensed under the GNU GPLv2 and later. + * + * Heavily based on milkymist-vgafb.c, copyright terms below: + * QEMU model of the Milkymist VGA framebuffer. + * + * Copyright (c) 2010-2012 Michael Walle + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see . + * + */ + +#include "qemu/osdep.h" +#include "hw/display/bcm2835_fb.h" +#include "hw/display/framebuffer.h" +#include "ui/pixel_ops.h" +#include "hw/misc/bcm2835_mbox_defs.h" + +#define DEFAULT_VCRAM_SIZE 0x4000000 +#define BCM2835_FB_OFFSET 0x00100000 + +static void fb_invalidate_display(void *opaque) +{ + BCM2835FBState *s = BCM2835_FB(opaque); + + s->invalidate = true; +} + +static void draw_line_src16(void *opaque, uint8_t *dst, const uint8_t *src, + int width, int deststep) +{ + BCM2835FBState *s = opaque; + uint16_t rgb565; + uint32_t rgb888; + uint8_t r, g, b; + DisplaySurface *surface = qemu_console_surface(s->con); + int bpp = surface_bits_per_pixel(surface); + + while (width--) { + switch (s->bpp) { + case 8: + /* lookup palette starting at video ram base + * TODO: cache translation, rather than doing this each time! + */ + rgb888 = ldl_le_phys(&s->dma_as, s->vcram_base + (*src << 2)); + r = (rgb888 >> 0) & 0xff; + g = (rgb888 >> 8) & 0xff; + b = (rgb888 >> 16) & 0xff; + src++; + break; + case 16: + rgb565 = lduw_le_p(src); + r = ((rgb565 >> 11) & 0x1f) << 3; + g = ((rgb565 >> 5) & 0x3f) << 2; + b = ((rgb565 >> 0) & 0x1f) << 3; + src += 2; + break; + case 24: + rgb888 = ldl_le_p(src); + r = (rgb888 >> 0) & 0xff; + g = (rgb888 >> 8) & 0xff; + b = (rgb888 >> 16) & 0xff; + src += 3; + break; + case 32: + rgb888 = ldl_le_p(src); + r = (rgb888 >> 0) & 0xff; + g = (rgb888 >> 8) & 0xff; + b = (rgb888 >> 16) & 0xff; + src += 4; + break; + default: + r = 0; + g = 0; + b = 0; + break; + } + + if (s->pixo == 0) { + /* swap to BGR pixel format */ + uint8_t tmp = r; + r = b; + b = tmp; + } + + switch (bpp) { + case 8: + *dst++ = rgb_to_pixel8(r, g, b); + break; + case 15: + *(uint16_t *)dst = rgb_to_pixel15(r, g, b); + dst += 2; + break; + case 16: + *(uint16_t *)dst = rgb_to_pixel16(r, g, b); + dst += 2; + break; + case 24: + rgb888 = rgb_to_pixel24(r, g, b); + *dst++ = rgb888 & 0xff; + *dst++ = (rgb888 >> 8) & 0xff; + *dst++ = (rgb888 >> 16) & 0xff; + break; + case 32: + *(uint32_t *)dst = rgb_to_pixel32(r, g, b); + dst += 4; + break; + default: + return; + } + } +} + +static void fb_update_display(void *opaque) +{ + BCM2835FBState *s = opaque; + DisplaySurface *surface = qemu_console_surface(s->con); + int first = 0; + int last = 0; + int src_width = 0; + int dest_width = 0; + + if (s->lock || !s->xres) { + return; + } + + src_width = s->xres * (s->bpp >> 3); + dest_width = s->xres; + + switch (surface_bits_per_pixel(surface)) { + case 0: + return; + case 8: + break; + case 15: + dest_width *= 2; + break; + case 16: + dest_width *= 2; + break; + case 24: + dest_width *= 3; + break; + case 32: + dest_width *= 4; + break; + default: + hw_error("bcm2835_fb: bad color depth\n"); + break; + } + + if (s->invalidate) { + framebuffer_update_memory_section(&s->fbsection, s->dma_mr, s->base, + s->yres, src_width); + } + + framebuffer_update_display(surface, &s->fbsection, s->xres, s->yres, + src_width, dest_width, 0, s->invalidate, + draw_line_src16, s, &first, &last); + + if (first >= 0) { + dpy_gfx_update(s->con, 0, first, s->xres, last - first + 1); + } + + s->invalidate = false; +} + +static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value) +{ + value &= ~0xf; + + s->lock = true; + + s->xres = ldl_le_phys(&s->dma_as, value); + s->yres = ldl_le_phys(&s->dma_as, value + 4); + s->xres_virtual = ldl_le_phys(&s->dma_as, value + 8); + s->yres_virtual = ldl_le_phys(&s->dma_as, value + 12); + s->bpp = ldl_le_phys(&s->dma_as, value + 20); + s->xoffset = ldl_le_phys(&s->dma_as, value + 24); + s->yoffset = ldl_le_phys(&s->dma_as, value + 28); + + s->base = s->vcram_base | (value & 0xc0000000); + s->base += BCM2835_FB_OFFSET; + + /* TODO - Manage properly virtual resolution */ + + s->pitch = s->xres * (s->bpp >> 3); + s->size = s->yres * s->pitch; + + stl_le_phys(&s->dma_as, value + 16, s->pitch); + stl_le_phys(&s->dma_as, value + 32, s->base); + stl_le_phys(&s->dma_as, value + 36, s->size); + + s->invalidate = true; + qemu_console_resize(s->con, s->xres, s->yres); + s->lock = false; +} + +void bcm2835_fb_reconfigure(BCM2835FBState *s, uint32_t *xres, uint32_t *yres, + uint32_t *xoffset, uint32_t *yoffset, uint32_t *bpp, + uint32_t *pixo, uint32_t *alpha) +{ + s->lock = true; + + /* TODO: input validation! */ + if (xres) { + s->xres = *xres; + } + if (yres) { + s->yres = *yres; + } + if (xoffset) { + s->xoffset = *xoffset; + } + if (yoffset) { + s->yoffset = *yoffset; + } + if (bpp) { + s->bpp = *bpp; + } + if (pixo) { + s->pixo = *pixo; + } + if (alpha) { + s->alpha = *alpha; + } + + /* TODO - Manage properly virtual resolution */ + + s->pitch = s->xres * (s->bpp >> 3); + s->size = s->yres * s->pitch; + + s->invalidate = true; + qemu_console_resize(s->con, s->xres, s->yres); + s->lock = false; +} + +static uint64_t bcm2835_fb_read(void *opaque, hwaddr offset, unsigned size) +{ + BCM2835FBState *s = opaque; + uint32_t res = 0; + + switch (offset) { + case MBOX_AS_DATA: + res = MBOX_CHAN_FB; + s->pending = false; + qemu_set_irq(s->mbox_irq, 0); + break; + + case MBOX_AS_PENDING: + res = s->pending; + break; + + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", + __func__, offset); + return 0; + } + + return res; +} + +static void bcm2835_fb_write(void *opaque, hwaddr offset, uint64_t value, + unsigned size) +{ + BCM2835FBState *s = opaque; + + switch (offset) { + case MBOX_AS_DATA: + /* bcm2835_mbox should check our pending status before pushing */ + assert(!s->pending); + s->pending = true; + bcm2835_fb_mbox_push(s, value); + qemu_set_irq(s->mbox_irq, 1); + break; + + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", + __func__, offset); + return; + } +} + +static const MemoryRegionOps bcm2835_fb_ops = { + .read = bcm2835_fb_read, + .write = bcm2835_fb_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .valid.min_access_size = 4, + .valid.max_access_size = 4, +}; + +static const VMStateDescription vmstate_bcm2835_fb = { + .name = TYPE_BCM2835_FB, + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_BOOL(lock, BCM2835FBState), + VMSTATE_BOOL(invalidate, BCM2835FBState), + VMSTATE_BOOL(pending, BCM2835FBState), + VMSTATE_UINT32(xres, BCM2835FBState), + VMSTATE_UINT32(yres, BCM2835FBState), + VMSTATE_UINT32(xres_virtual, BCM2835FBState), + VMSTATE_UINT32(yres_virtual, BCM2835FBState), + VMSTATE_UINT32(xoffset, BCM2835FBState), + VMSTATE_UINT32(yoffset, BCM2835FBState), + VMSTATE_UINT32(bpp, BCM2835FBState), + VMSTATE_UINT32(base, BCM2835FBState), + VMSTATE_UINT32(pitch, BCM2835FBState), + VMSTATE_UINT32(size, BCM2835FBState), + VMSTATE_UINT32(pixo, BCM2835FBState), + VMSTATE_UINT32(alpha, BCM2835FBState), + VMSTATE_END_OF_LIST() + } +}; + +static const GraphicHwOps vgafb_ops = { + .invalidate = fb_invalidate_display, + .gfx_update = fb_update_display, +}; + +static void bcm2835_fb_init(Object *obj) +{ + BCM2835FBState *s = BCM2835_FB(obj); + + memory_region_init_io(&s->iomem, obj, &bcm2835_fb_ops, s, TYPE_BCM2835_FB, + 0x10); + sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); + sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq); +} + +static void bcm2835_fb_reset(DeviceState *dev) +{ + BCM2835FBState *s = BCM2835_FB(dev); + + s->pending = false; + + s->xres_virtual = s->xres; + s->yres_virtual = s->yres; + s->xoffset = 0; + s->yoffset = 0; + s->base = s->vcram_base + BCM2835_FB_OFFSET; + s->pitch = s->xres * (s->bpp >> 3); + s->size = s->yres * s->pitch; + + s->invalidate = true; + s->lock = false; +} + +static void bcm2835_fb_realize(DeviceState *dev, Error **errp) +{ + BCM2835FBState *s = BCM2835_FB(dev); + Error *err = NULL; + Object *obj; + + if (s->vcram_base == 0) { + error_setg(errp, "%s: required vcram-base property not set", __func__); + return; + } + + obj = object_property_get_link(OBJECT(dev), "dma-mr", &err); + if (obj == NULL) { + error_setg(errp, "%s: required dma-mr link not found: %s", + __func__, error_get_pretty(err)); + return; + } + + s->dma_mr = MEMORY_REGION(obj); + address_space_init(&s->dma_as, s->dma_mr, NULL); + + bcm2835_fb_reset(dev); + + s->con = graphic_console_init(dev, 0, &vgafb_ops, s); + qemu_console_resize(s->con, s->xres, s->yres); +} + +static Property bcm2835_fb_props[] = { + DEFINE_PROP_UINT32("vcram-base", BCM2835FBState, vcram_base, 0),/*required*/ + DEFINE_PROP_UINT32("vcram-size", BCM2835FBState, vcram_size, + DEFAULT_VCRAM_SIZE), + DEFINE_PROP_UINT32("xres", BCM2835FBState, xres, 640), + DEFINE_PROP_UINT32("yres", BCM2835FBState, yres, 480), + DEFINE_PROP_UINT32("bpp", BCM2835FBState, bpp, 16), + DEFINE_PROP_UINT32("pixo", BCM2835FBState, pixo, 1), /* 1=RGB, 0=BGR */ + DEFINE_PROP_UINT32("alpha", BCM2835FBState, alpha, 2), /* alpha ignored */ + DEFINE_PROP_END_OF_LIST() +}; + +static void bcm2835_fb_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->props = bcm2835_fb_props; + dc->realize = bcm2835_fb_realize; + dc->reset = bcm2835_fb_reset; + dc->vmsd = &vmstate_bcm2835_fb; +} + +static TypeInfo bcm2835_fb_info = { + .name = TYPE_BCM2835_FB, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(BCM2835FBState), + .class_init = bcm2835_fb_class_init, + .instance_init = bcm2835_fb_init, +}; + +static void bcm2835_fb_register_types(void) +{ + type_register_static(&bcm2835_fb_info); +} + +type_init(bcm2835_fb_register_types) diff --git a/include/hw/arm/bcm2835_peripherals.h b/include/hw/arm/bcm2835_peripherals.h index 889adf5..e19d360 100644 --- a/include/hw/arm/bcm2835_peripherals.h +++ b/include/hw/arm/bcm2835_peripherals.h @@ -15,6 +15,7 @@ #include "exec/address-spaces.h" #include "hw/sysbus.h" #include "hw/char/bcm2835_aux.h" +#include "hw/display/bcm2835_fb.h" #include "hw/intc/bcm2835_ic.h" #include "hw/misc/bcm2835_property.h" #include "hw/misc/bcm2835_mbox.h" @@ -35,6 +36,7 @@ typedef struct BCM2835PeripheralState { SysBusDevice *uart0; BCM2835AuxState aux; + BCM2835FBState fb; BCM2835ICState ic; BCM2835PropertyState property; BCM2835MboxState mboxes; diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h new file mode 100644 index 0000000..9a12d7a --- /dev/null +++ b/include/hw/display/bcm2835_fb.h @@ -0,0 +1,47 @@ +/* + * Raspberry Pi emulation (c) 2012 Gregory Estrade + * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous + * + * Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft + * Written by Andrew Baumann + * + * This code is licensed under the GNU GPLv2 and later. + */ + +#ifndef BCM2835_FB_H +#define BCM2835_FB_H + +#include "hw/sysbus.h" +#include "exec/address-spaces.h" +#include "ui/console.h" + +#define TYPE_BCM2835_FB "bcm2835-fb" +#define BCM2835_FB(obj) OBJECT_CHECK(BCM2835FBState, (obj), TYPE_BCM2835_FB) + +typedef struct { + /*< private >*/ + SysBusDevice busdev; + /*< public >*/ + + uint32_t vcram_base, vcram_size; + MemoryRegion *dma_mr; + AddressSpace dma_as; + MemoryRegion iomem; + MemoryRegionSection fbsection; + QemuConsole *con; + qemu_irq mbox_irq; + + bool lock, invalidate, pending; + uint32_t xres, yres; + uint32_t xres_virtual, yres_virtual; + uint32_t xoffset, yoffset; + uint32_t bpp; + uint32_t base, pitch, size; + uint32_t pixo, alpha; +} BCM2835FBState; + +void bcm2835_fb_reconfigure(BCM2835FBState *s, uint32_t *xres, uint32_t *yres, + uint32_t *xoffset, uint32_t *yoffset, uint32_t *bpp, + uint32_t *pixo, uint32_t *alpha); + +#endif -- 2.7.4